@width: 200px;
@border: 1px solid #f00;
#box {
  width: @width;
  border: @border;

  ul {
    margin: 0;
    padding: 0;
    list-style: none;

    li {
      height: 30px;
      background: #ccc;
      a {
        color: #f00;
        &:hover {
          color: #008000;
        }
      }
    }
  }
}
